My natural pistol shooting stance is similar to what Mr. Ayoob describes here. And I am all but abandoning iron sights (probably because of the old man vision thing) and migrating to red dots. I still practice with irons, but it's not as pretty as my results with optics.
That said, when I took carbine training a couple of years ago, the "keep your head still and move the rifle up and into proper position" was pounded into my head.
Net-net, I think the head down position works with pistol shooting and not so much with rifles. And as for losing the dot while tactically turtling? Training, Holmes! For me, finding the dot is more about pressing out with the pistol and letting the dot "appear" where it's supposed to. With proper grip and stance (yes, even with head down), I find the dot ends up where it's supposed to be. Almost like that's the way it was designed
That said, when I took carbine training a couple of years ago, the "keep your head still and move the rifle up and into proper position" was pounded into my head.
Net-net, I think the head down position works with pistol shooting and not so much with rifles. And as for losing the dot while tactically turtling? Training, Holmes! For me, finding the dot is more about pressing out with the pistol and letting the dot "appear" where it's supposed to. With proper grip and stance (yes, even with head down), I find the dot ends up where it's supposed to be. Almost like that's the way it was designed